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-   -   heater core bypass? (https://ecomodder.com/forum/showthread.php/heater-core-bypass-22027.html)

brent777 05-24-2012 06:33 AM

heater core bypass?
 
has anyone ever done a heater core bypass??? did you see better mpg from it?
i think it would help without

Daox 05-24-2012 07:48 AM

If you have a really short commute it may be worth while to look into. Other than that I don't see it having much effect.

brent777 05-24-2012 08:10 AM

oh well your probably right :(

Daox 05-24-2012 08:24 AM

Any idea how much coolant the heater core holds? I think my entire coolant system for my ~1.5L engines hold about 1 gallon. If we get a few numbers on things we can calculate what % of thermal mass the coolant in the core consists of versus the coolant in the engine and the thermal mass of the engine.

brent777 05-24-2012 08:36 AM

6 liters well im thinking about how the coolant is circulating all the time

Daox 05-24-2012 08:40 AM

Yeah I understand. By bypassing the heater core you would lessen the initial amount of thermal mass you need to heat to get the engine up to temperature which means you get up to temperature faster. Its not a bad idea, we just have to determine if we're actually reducing that by any notable amount. My initial guess is probably not, but it can be calculated.

Ryland 05-24-2012 08:52 AM

Quote:

Originally Posted by brent777 (Post 308762)
6 liters well im thinking about how the coolant is circulating all the time

My heater core has a valve on it that it only opened up when the heat is turned on.

D.O.G. 05-24-2012 04:05 PM

Quote:

Originally Posted by Ryland (Post 308764)
My heater core has a valve on it that it only opened up when the heat is turned on.

My cars do also.

I've read on performance sites that a heater bypass can cause hot spots in the engine due to changed coolant flow.
It's better to simply block the coolant lines to the heater if you want to remove it.

brent777 05-24-2012 10:11 PM

Quote:

Originally Posted by Daox (Post 308763)
Yeah I understand. By bypassing the heater core you would lessen the initial amount of thermal mass you need to heat to get the engine up to temperature which means you get up to temperature faster. Its not a bad idea, we just have to determine if we're actually reducing that by any notable amount. My initial guess is probably not, but it can be calculated.


ya your right on :) wait how can we calculate it?

brent777 05-24-2012 10:13 PM

Quote:

Originally Posted by Ryland (Post 308764)
My heater core has a valve on it that it only opened up when the heat is turned on.


cool! what kind of car you got? can i buy the value aftermarket? for say a 97 nissan pickup lol


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